Head mounted device

ABSTRACT

A head mounted device includes a housing that defines an interior space and an elongate member that is connected to the housing and is configured to expand and contract to conform to the head of a user. The elongate member includes at least one end portion that is connected to the housing at an attachment point. The attachment point is located in the interior space of the housing such that the end portion of the elongate member extends along a path within the housing that has a length that is greater than half of a lateral width of the housing.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No.62/729,551 filed on Sep. 11, 2018, the contents of which is herebyincorporated by reference herein in its entirety for all purposes.

TECHNICAL FIELD

This disclosure relates generally to head mounted devices that areconfigured to display content to a user.

BACKGROUND

Virtual reality systems, augmented reality systems, and mixed realitysystems often include a head mounted device that displays content to auser. The head mounted device may include a housing that is worn on theuser's head and is supported by a flexible support or a rigid support.Head mounted devices of this type typically require some manner ofadjustment to fit the user's head. Incorrect size adjustments can resultin user discomfort and instability of the device relative to the user'shead. Manual adjustment may also be time consuming and inconvenient.

SUMMARY

One aspect of the disclosure is a head mounted device that includes ahousing that defines an interior space and an elongate member that isconnected to the housing and is configured to expand and contract toconform to the head of a user. The elongate member includes at least oneend portion that is connected to the housing at an attachment point. Theattachment point is located in the interior space of the housing suchthat the end portion of the elongate member extends along a path withinthe housing that has a length that is greater than half of a lateralwidth of the housing.

Another aspect of the disclosure is a head mounted device that includesa housing that defines an interior space and an elongate member controlmechanism that is coupled to the interior space of the housing. The headmounted device may include an elongate member that is coupled to theelongate member control mechanism and is configured to extendcircumferentially around the head of a user, where the elongate membercontrol mechanism is operable to extend and retract the elongate member.The head mounted device may include an elongate member retainingmechanism that is located in the housing and is operable to engage theelongate member to restrain extension and retraction of the elongatemember.

Another aspect of the disclosure is a head mounted device that includesa housing that defines an interior space and an elongate member controlmechanism that is coupled to the interior space of the housing. The headmounted device may include an elongate member that is coupled to theelongate member control mechanism and configured to extendcircumferentially around the head of a user, where the elongate membercontrol mechanism is operable to extend and retract the elongate member.The head mounted device may include lenses coupled to the housing. Theelongate member may include a lens cover having at least one connectorconfigured to removably connect to the housing. The lens cover ismoveable relative to the housing between a connected position and adisconnected position.

Another aspect of the disclosure is a head mounted device that includesa housing and a first elongate member that is connected to the housingand is configured to extend around a first portion of the head of auser. The head mounted device may include a first magnetic connectorthat is connected to the first elongate member, and the head mounteddevice may include a second magnetic connector. The first magneticconnector and the second magnetic connector are movable between aconnected position, in which the first elongate member is configured tosecure the housing with respect to the head of a user, and adisconnected position, in which the first elongate member is configuredto release the housing with respect to the head of the user.

Another aspect of the disclosure is a method for correcting orientationof a head mounted device. The method includes detecting motion of adisplay enclosure using a first motion sensing device, detecting motionof an elongate member using a second motion sensing device, determiningwhether a position of the display enclosure changes relative to theelongate member based on the detected motion of the display enclosureand the detected motion of the elongate member, and, in response to adetermination that a position of the display enclosure has changedrelative to the elongate member, applying a correction to the displayenclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a head mounted device according to a firstexample.

FIG. 2 is a block diagram of components that can be included in the headmounted device according to the first example.

FIG. 3 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device according to a second example.

FIG. 4 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device according to a third example.

FIG. 5 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device according to a fourth example.

FIG. 6 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device according to a fifth example.

FIG. 7 is a front cross-sectional view taken along line B-B of FIG. 1 ofa head mounted device according to a sixth example.

FIG. 8 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device according to a seventh example.

FIG. 9 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device according to an eighth example in a retractedposition.

FIG. 10 is a top cross-sectional view taken along line A-A of FIG. 1 ofthe head mounted device according to the eighth example in an extendedposition.

FIG. 11 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device according to a ninth example in a retractedposition.

FIG. 12 is a top cross-sectional view taken along line A-A of FIG. 1 ofthe head mounted device according to the ninth example in an extendedposition.

FIG. 13 is a side view of a head mounted device according to a tenthexample in a retracted position.

FIG. 14 is a side view of the head mounted device according to the tenthexample in an extended position.

FIG. 15 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device according to an eleventh example in a retractedposition.

FIG. 16 is a top cross-sectional view taken along line A-A of FIG. 1 ofthe head mounted device according to the eleventh example in an extendedposition.

FIG. 17 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device according to a twelfth example.

FIG. 18 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device according to a thirteenth example.

FIG. 19 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device according to a fourteenth example.

FIG. 20 is a side view of an elongate member retaining mechanism in anopen position.

FIG. 21 is a side view of the elongate member retaining mechanism ofFIG. 20 in a closed position.

FIG. 22 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device according to a fifteenth example.

FIG. 23 is a perspective view of a head mounted device according to asixteenth example in a connected position.

FIG. 24 is a perspective view of the head mounted device according tothe sixteenth example in a disconnected position.

FIG. 25 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device according to a seventeenth example in a retractedposition.

FIG. 26 is a top cross-sectional view taken along line A-A of FIG. 1 ofthe head mounted device according to the seventeenth example in anextended position.

FIG. 27 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device according to an eighteenth example in a retractedposition.

FIG. 28 is a top cross-sectional view taken along line A-A of FIG. ofthe head mounted device according to the eighteenth example in anextended position.

FIG. 29 is a side view of a head mounted device according to anineteenth example in a first position.

FIG. 30 is a side view of the head mounted device according to thenineteenth example in a second position.

FIG. 31 is a flowchart showing a method for correcting an orientation ofthe head mounted device according to the nineteenth example.

DETAILED DESCRIPTION

The devices and methods herein allow for simplified adjustment of a headmounted device that includes a housing and an elongate member disposedaround the head of a user. By disposing a portion of the elongate memberin an interior space of the housing and connecting the elongate memberto the housing using elastic, sprung, electrical, and/or mechanicalelements, the elongate member can be extended out of the housing andaround the head of the user such that the elongate member automaticallyadjusts to the size of the user's head. As a result, adjustment of thehead mounted device is simplified, the length of time required to beginusing the device is shortened, user comfort is increased, the stabilityof the head mounted device relative to the user's head is improved, andan ideal fit can be achieved for all users regardless of variations inuser head size.

FIG. 1 is a side view of a head mounted device 100 worn by a user. Thehead mounted device 100 may be worn on the head 102 of the user and mayallow the user to view images or other content using a display. Thecontent may be part of an immersive experience in which the contentappears to replace, supplement, or change the environment around theuser. In the examples that are shown and described herein, the headmounted device 100 is configured to display virtual reality content tothe user. For example, the head mounted device 100 may be configured todisplay the virtual reality content to the user in correspondence withtracked motion of the head 102 of the user, and such that the virtualreality content is displayed to the user to the exclusion of theenvironment around the user. The configurations described herein can beutilized with head mounted devices that are configured to display othertypes of content such as augmented reality content and mixed realitycontent.

In the illustrated example, the head mounted device 100 includes ahousing 104 and an elongate member 106 (e.g., a headband). The housing104 provides a structure to which other components of the head mounteddevice 100 may connect. The housing 104 may be shaped so as to be wornon the user's head 102 and/or face and may be selectively positioned tobe near the user's eyes. The housing 104 is removably, permanently, orsemi permanently connected to at least a portion of the elongate member106, which may be referred to as a strap or headband.

The elongate member 106 supports, positions, and/or secures the housing104 to the user's head 102. The elongate member 106 may be adjustedbetween an extended position in which the elongate member 106 may beextended around the head 102 of the user and a retracted position. As anexample, the elongate member 106 may be in the extended position whenthe head mounted device 100 is being used, and the elongate member 106may be in the retracted position when the head mounted device 100 is notbeing used.

As shown in FIG. 1, the elongate member 106 supports the head mounteddevice 100 relative to the head 102 of the user in a goggles-styleconfiguration in which the elongate member 106 is connected to thelateral sides of the housing 104 and extends around the head 102 of theuser. In alternative implementations, the head mounted device 100 may besupported with respect to the user's head 102 using a halo-styleconfiguration in which a support plate contacts the user's forehead andthe elongate member 106 secures the support plate to the head 102 of theuser, or using any other suitable configuration.

In the examples described herein, the elongate member 106 may be orinclude a strap or headband formed from an elastic material, such asnylon or another suitable material. In the examples described herein,the elongate member 106 may be or include a cord formed from an elasticmaterial, such as nylon or another suitable material. In someimplementations, the elongate member 106 includes both strap portionsand cord portions. In some implementations, other types of structuresare included in the elongate member 106. In some implementations, theelongate member 106 may include inelastic structures in addition toelastic structures.

FIG. 2 is a block diagram of components that can be included in the headmounted device 100. The head mounted device 100 may include featuressimilar to those of the head mounted device 100. The head mounted device100 may include components connected to or retained in the housing 104.Such components may include, but are not limited to, optics 208, sensors210, a controller 212 including a memory and a processor, storage 214,an interface 216, an input device 218, a display 220, and a power source222. The components connected to or retained in the housing 104 may beconnected to an external device that is removably connected to thehousing 104.

The optics 208 may guide light that is emitted by the display 220 to theuser's eyes to allow content to be presented to the user. The optics 208may include lenses or other suitable components.

The sensors 210 may be located in the housing 104 or may be otherwiseincorporated into the head mounted device 100. The sensors 210 areadapted to output signals that represent or are indicative of a sensedcondition. The sensors 210 may include visible spectrum cameras;infrared spectrum cameras; structured-light stereo devices; depthcameras; an inertial measuring unit including accelerometers,gyroscopes, and magnetometers; lidar devices; radar devices; ultrasonicdevices; infrared detectors; infrared beacons that emit signals that canbe measured by external infrared detectors; capacitance sensors;biometric sensors; temperature sensors; light sensors; pressure sensors;force sensors; or any other type of sensor. The signals that aregenerated by the sensors 210 may be used during generation of thecontent that is presented to the user, such as by determining ahead-tracking angle using the sensors 210 and generating contentdependent on the head-tracking angle.

The controller 212 may include a processor and a memory. The controller212 may be located in the housing 104 or may be otherwise incorporatedinto the head mounted device 100. The controller 212 may be inelectrical communication with any described component. The processor isoperable to execute machine-readable instructions that may be stored inthe memory or the storage 214. The processor may be a central processingunit or any other conventional device. The memory may be a random-accessmemory module or any other high-speed, volatile, short-term informationstorage device. The storage 214 may include a solid-state drive, harddrive, or any other non-volatile information storage device.

The interface 216 allows the head mounted device 100 to communicate withexternal devices. The interface 216 may include a wired connection or awireless connection that is implemented using any suitablecommunications protocol.

The input device 218 may include manual buttons, switches, analogsticks, directional pads, or the like; a handheld motion-trackedcontroller; a touchscreen input device; a gestural input device; or anaudio input device such as a microphone.

The display 220 is operable to output images including still images andvideo images. The display 220 may include an LED screen, an LCD screen,or an OLED screen. The display 220 may be integral with the housing 104or may be included in an external device that is removably connected tothe housing 104.

The power source 222 supplies electrical power to the head mounteddevice 100. The power source 222 may include a battery, such as arechargeable battery or a non-rechargeable battery of any suitable type.

The general configuration of the head mounted device 100, as describedwith respect to FIGS. 1-2, is generally applicable to head mounteddevices according to second through nineteenth examples that will bedescribed herein and is hereby incorporated by reference in thedescriptions of those devices.

FIG. 3 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device 300 according to a second example. The head mounteddevice 300 may include features similar to those of the head mounteddevice 100 except as otherwise described. In the illustrated example,the head mounted device 300 includes a housing 304 and an elongatemember 306. The elongate member 306 is connected to the housing 304 suchthat it is movable with respect to the housing 304 between a retractedposition, in which at least a portion of the elongate member 306 isstored within the housing 304, and an extended position. As an example,twenty-five percent or more of the elongate member 306 may be stored inthe housing 304 in the retracted position.

The housing 304 has an interior space 324 that defines a passage 326. Asused herein, the term “passage” refers to a partially or fully enclosedarea within the housing 304 through which the elongate member 306 maypass. The passage 326 extends from a first opening 328 at a firstlateral side 330 of the housing 304 to a second opening 332 at a secondlateral side 334 of the housing 304. In the illustrated example, thepassage 326 extends laterally across the housing 304 from the firstlateral side 330 to the second lateral side 334 and is generallystraight. The passage 326 may, however, be configured differently. Asexamples, the passage 326 may be straight, may be curved, may define aserpentine configuration, or may be configured according to any othershape. While the interior space 324 in the illustrated example defines apassage, it may additionally or alternatively define an opening, recess,cavity, depression, enclosure, and/or other interior space.

The elongate member 306 is a flexible, elastic structure, such as astrap, a cord, a strap and cord in combination, or any other suitableflexible, elastic structure. The elongate member 306 includes a firstend portion 336 and a second end portion 342. Although the elongatemember 306 is flexible and elastic, components and structuresincorporated in or attached to the elongate member 306 may be inflexibleand/or inelastic.

The first end portion 336 is a part of the elongate member 306 that islocated inside the housing 304, inclusive of the location at which theelongate member 306 terminates. The first end portion 336 is connectedto the housing 304 at a first attachment point 338. The first endportion 336 extends along a first path 340 through the passage 326 fromthe first attachment point 338 to the first opening 328. As used herein,the term “first path” is defined as the path along which a first part ofthe elongate member 306 extends, such as from the first attachment point338 to the first opening 328 in this example. The first attachment point338 is located in the interior space 324 at a position that is near thesecond lateral side 334. The first end portion 336 may be connected tothe housing 304 at the first attachment point 338 using any type ofadhesive, magnets, stitching, hook-and-loop fasteners, welding, rivets,interference fit, snaps, fastener, or any other type of attachment.

To allow storage of part of the elongate member 306 in the housing 304in the retracted position, the first path 340 has a length that isgreater than half of a lateral width of the housing 304. In someimplementations, the first path 340 may extend along any lateral widthof the housing 304.

The second end portion 342 is located at an opposite end of the elongatemember 306 relative to the first end portion 336. The second end portion342 may or may not be the same length as the first end portion 336.

The second end portion 342 is a part of the elongate member 306 that islocated inside the housing 304, inclusive of the location at which theelongate member 306 terminates. The second end portion 342 is connectedto the housing 304 at a second attachment point 344. The second endportion 342 extends along a second path 346 through the passage 326 fromthe second attachment point 344 to the second opening 332. As usedherein, the term “second path” is defined as the path along which asecond part of the elongate member 306 extends, such as from the secondattachment point 344 to the second opening 332 in this example. Thesecond attachment point 344 is located in the interior space 324 at aposition that is near the first lateral side 330. The second end portion342 may be connected to the housing 304 at the second attachment point344 using any type of adhesive, magnets, stitching, hook-and-loopfasteners, welding, rivets, interference fit, snaps, fastener, or anyother type of attachment.

To allow storage of part of the elongate member 306 in the housing 304in the retracted position, the second path 346 has a length that isgreater than half of a lateral width of the housing 304. In someimplementations, the second path 346 may extend along any lateral widthof the housing 304.

The length of the first end portion 336 and the second end portion 342inside the interior space 324 may change when the elongate member 306 isadjusted between the retracted position and the extended position, as aresult of elastic expansion and contraction of the elongate member 306.The elongate member 306 may be adjusted to the extended position whenthe elongate member 306 is disposed around the head of the user. In theextended position, part of the first end portion 336 and/or part of thesecond end portion 342 elastically extend from inside the interior space324 to an exterior of the housing 304. The elongate member 306 mayreturn to the retracted position if the elongate member 306 is removedfrom the head of the user. In the retracted position, part of the firstend portion 336 and part of the second end portion 342 elasticallyretract into the interior space 324. More of the elongate member 306 maybe stored in the interior space 324 in the retracted position than inthe extended position. As a result of the storage of portions of theelongate member 306 in the housing 304, the effective working length(i.e., length that is available to expand and contract) of the elongatemember 306 is greater than the length that is disposed outside of thehousing 304 in the retracted position. This allows a smaller minimumhead size to be accommodated by the elongate member 306, while stillallowing expansion for large head sizes as a part of the elongate member306 that is inside the housing 304 lengthens elastically and exits thehousing 304 during movement toward the expanded position (i.e., thatposition at which a maximum head size is accommodated by the elongatemember 306).

FIG. 4 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device 400 according to a third example. The head mounteddevice 400 may include features similar to those of the head mounteddevice 300 except as otherwise described. In the illustrated example,the head mounted device 400 includes a housing 404 and an elongatemember 406.

The housing 404 has an interior space 424 that defines a first passage448 and a second passage 450. The first passage 448 extends laterallyacross the housing 404 from a first opening 428 to a first attachmentpoint 438 that is located in the first passage 448 at a position that isnear a second lateral side 434 of the housing 404. The second passage450 extends laterally from a second opening 432 to a second attachmentpoint 444 that is located in the second passage 450 at a position thatis near a first lateral side 430 of the housing 404. The first passage448 and the second passage 450 shown in the illustrated example aregenerally straight. The first passage 448 and the second passage 450may, however, be configured differently. As examples, the first passage448 and the second passage 450 may be straight, may be curved, maydefine a serpentine configuration, or may be configured according to anyother shape. The first passage 448 and the second passage 450 may or maynot be the same shape.

In the illustrated example, a first end portion 436 of the elongatemember 406 extends from the first attachment point 438, along a firstpath 440 through the first passage 448, and to the first opening 428. Asecond end portion 442 extends from the second attachment point 444,along a second path 446 through the second passage 450, and to thesecond opening 432.

FIG. 5 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device 500 according to a fourth example. The head mounteddevice 500 may include features similar to those of the head mounteddevice 400 except as otherwise described. In the illustrated example,the head mounted device 500 includes a housing 504 and an elongatemember 506. The housing 504 has an interior space 524 that defines afirst passage 548 and a second passage 550. The first passage 548extends in a U-shape from a first opening 528 to a first attachmentpoint 538. The first attachment point 538 is located in the firstpassage 548 at a position that is near a first lateral side 530 of thehousing 504. The second passage 550 extends in a U-shape from a secondopening 532 to a second attachment point 544. The second attachmentpoint 544 is located in the second passage 550 at a position that isnear a second lateral side 534 of the housing 504. The first passage 548and the second passage 550 are generally U-shaped. The first passage 548and the second passage 550 may, however, be configured differently. Asexamples, the first passage 548 and the second passage 550 may bestraight, may be curved, may define a serpentine configuration, or maybe configured according to any other shape. The first passage 548 andthe second passage 550 may or may not be the same shape and may includeany number of bends, curves, or turns.

In the illustrated example, a first end portion 536 of the elongatemember 506 extends from the first attachment point 538, along a firstpath 540 through the first passage 548, and to the first opening 528. Asecond end portion 542 extends from the second attachment point 544,along a second path 546 through the second passage 550, and to thesecond opening 532.

FIG. 6 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device 600 according to a fifth example. The head mounteddevice 600 may include features similar to those of the head mounteddevice 500 except as otherwise described.

In the illustrated example, the head mounted device 600 includes ahousing 604 and an elongate member 606. The housing 604 has an interiorspace 624 that defines a first passage 648 and a second passage 650. Thefirst passage 648 extends in a serpentine shape from a first opening 628to a first attachment point 638. The first attachment point 638 islocated in the first passage 648 at a position that is between a firstlateral side 630 of the housing 604 and a lateral center of the housing604. The second passage 650 extends in a serpentine shape from a secondopening 632 to a second attachment point 644. The second attachmentpoint 644 is located in the second passage 650 at a position that isbetween a second lateral side 634 of the housing 604 and a lateralcenter of the housing 604. In some embodiments, the first attachmentpoint 638 may be disposed at any distance from the first lateral side630. The second attachment point 644 may be disposed at any distancefrom the second lateral side 634. The first passage 648 and the secondpassage 650 are generally serpentine shaped. The first passage 648 andthe second passage 650 may, however, be configured differently. Asexamples, the first passage 648 and the second passage 650 may have anyshape and/or may include any number of curves, bends, turns, spirals, orswitchbacks in any configuration and/or orientation. The first passage648 and the second passage 650 may or may not be the same shape.

In the illustrated example, a first end portion 636 of the elongatemember 606 extends from the first attachment point 638, along a firstpath 640 through the first passage 648, and to the first opening 628. Asecond end portion 642 extends from the second attachment point 644,along a second path 646 through the second passage 650, and to thesecond opening 632.

FIG. 7 is a front cross-sectional view taken along line B-B of FIG. 1 ofa head mounted device 700 according to a sixth example. The head mounteddevice 700 may include features similar to those of the head mounteddevice 400 except as otherwise described. The head mounted device 700may include lenses 752 and components 754. In the illustrated example,the two lenses 752 are connected to the housing 704. The lenses 752 mayinclude one unitary lens or multiple lenses. Content from a display 720may be viewed by the user through the lenses 752. The components 754 areconnected to any portion of the housing 704. The components 754 mayinclude any described components or devices supported by the housing704, including those previously described.

In the illustrated example, the head mounted device 700 includes ahousing 704 and an elongate member 706. The housing 704 has an interiorspace 724 that defines a first passage 748 and a second passage 750. Thefirst passage 748 extends laterally along a top side 756 of the housing704 above the lenses 752 and components 754 from a first opening 728 toa first attachment point 738. The first attachment point 738 is locatedin the first passage 748 at a position that is near a second lateralside 734 of the housing 704. The second passage 750 extends laterallyalong a bottom side 758 of the housing 704 below the lenses 752 andcomponents 754 from a second opening 732 to a second attachment point744. The second attachment point 744 is located in the second passage750 at a position that is near a first lateral side 730 of the housing704. The first passage 748 and the second passage 750 are generallystraight. The first passage 748 and the second passage 750 may, however,be configured differently. As examples, the first passage 748 and thesecond passage 750 may be straight, may be curved, may define aserpentine configuration, or may be configured according to any othershape. The first passage 748 and the second passage 750 may or may notbe the same shape.

In the illustrated example, a first end portion 736 of the elongatemember 706 extends from the first attachment point 738, along a firstpath 740 through the first passage 748, and to the first opening 728. Asecond end portion 742 extends from the second attachment point 744,along a second path 746 through the second passage 750, and to thesecond opening 732.

In some embodiments, the first passage 748 may extend along the bottomside 758 of the housing 704, and the second passage 750 may extend alongthe top side 756 of the housing 704. In some embodiments, both the firstpassage 748 and the second passage 750 may extend along the top side 756of the housing 704 or the bottom side 758 of the housing 704. Theinterior space 724 of the housing 704 may also define one passageextending along the top side 756 of the housing 704 or the bottom side758 of the housing 704, through which both the first end portion 736 andthe second end portion 742 extend.

FIG. 8 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device 800 according to a seventh example. The head mounteddevice 800 may include features similar to those of the head mounteddevice 300 except as otherwise described. In the illustrated example,the head mounted device 800 includes a housing 804 and an elongatemember 806. The housing 804 has an interior space 824 that defines apassage 826. The passage 826 extends from a first opening 828, around aperiphery of the housing 804 and around the lenses 852 and thecomponents 854, and to a second opening 832. In the illustrated example,the passage 826 extends along a first lateral side 830, a front side860, and a second lateral side 834 of the housing 804. The firstattachment point 838 is disposed near the second opening 832. The secondattachment point 844 is disposed near the first opening 828. In someembodiments, the first attachment point 838 and the second attachmentpoint 844 may be disposed anywhere on the housing 804.

In the illustrated example, a first portion of the elongate member 806extends through the passage 826 from the first opening 828 to the firstattachment point 838, and a second portion of the elongate member 806extends through the passage 826 from the second opening 832 to thesecond attachment point 844. Thus, the first and second portions of theelongate member 806 extend through a common passage in the illustratedexample. In alternative implementations, the interior space 824 of thehousing 804 may define a first passage that extends around the peripheryof the housing 804 and around the lenses 852 and the components 854, andalong which the elongate member 806 may extend from the first opening828 to the first attachment point 838, as well as a second passage thatextends around the periphery of the housing 804 and around the lenses852 and the components 854, and along which the elongate member 806 mayextend from the second opening 832 to the second attachment point 844.

FIG. 9 is a top cross-sectional view taken along line A-A of FIG. 1 of ahead mounted device 900 according to an eighth example in a retractedposition. The head mounted device 900 may include features similar tothose of the head mounted device 300 except as otherwise described. Inthe illustrated example, the head mounted device 900 includes a housing904 and an elongate member 906. The housing 904 has an interior space924 that defines a passage 926. The passage 926 extends from a firstopening 928 located at a first lateral side 930 of the housing 904 to asecond opening 932 located at a second lateral side 934 of the housing904. A first attachment point 938 is disposed inside the passage 926 ata location near the second lateral side 934 of the housing 904. A secondattachment point 944 is disposed inside the passage 926 at a locationnear the first lateral side 930 of the housing 904. The passage 926 isgenerally straight. The passage 926 may, however, be configureddifferently. As examples, the passage 926 may be straight, may becurved, may define a serpentine configuration, or may be configuredaccording to any other shape.

In the illustrated example, a first end portion 936 of the elongatemember 906 extends from the first attachment point 938, along a firstpath 940 through the passage 926, and to the first opening 928. A secondend portion 942 extends from the second attachment point 944, along asecond path 946 through the passage 926, and to the second opening 932.

The first end portion 936 may be connected to the housing 904 at thefirst attachment point 938 by a first spring 962. The second end portion942 may be connected to the housing 904 at the second attachment point944 by a second spring 964. The first spring 962 and the second spring964 may be linear or variable rate extension, torsion, coil, flat,constant force, or any other suitable type of spring. The first spring962 may or may not be identical to the second spring 964.

FIG. 10 is a top cross-sectional view taken along line A-A of FIG. 1 ofthe head mounted device 900 according to the eighth example in anextended position. When the elongate member 906 is adjusted from theretracted position to the extended position (e.g., when the elongatemember 906 is extended around the head of the user) the first spring 962and the second spring 964 extend inside the passage 926 and exerttension on the elongate member 906. The tension exerted on the elongatemember 906 by the first spring 962 and the second spring 964 allow theelongate member 906 to support the housing 904 relative to the user'shead. In the extended position, part of the first end portion 936 andpart of the second end portion 942 are extended out of the passage 926to the exterior of the housing 904. When the elongate member 906 isremoved from the user's head, the first spring 962 and the second spring964 exert tension on the elongate member 906 until the first spring 962and the second spring 964 are fully compressed. As a result, the firstend portion 936 and the second end portion 942 of the elongate member906 are retracted inside the passage 926, and the elongate member 906returns to the retracted position.

FIG. 11 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device 1100 according to a ninth example in a retractedposition. The head mounted device 1100 may include features similar tothose of the head mounted device 400 and the head mounted device 900except as otherwise described. In the illustrated example, the headmounted device 1100 includes a housing 1104 and an elongate member 1106.The housing 1104 has an interior space 1124 that defines a first passage1148 and a second passage 1150. The first passage 1148 extends laterallyacross the housing 1104 from a first opening 1128 to a first attachmentpoint 1138 that is located in the first passage 1148 at a position thatis near a second lateral side 1134 of the housing 1104. The secondpassage 1150 extends laterally from a second opening 1132 to a secondattachment point 1144 that is located in the second passage 1150 at aposition that is near a first lateral side 1130 of the housing 1104. Thefirst passage 1148 and the second passage 1150 shown in the illustratedexample are generally straight. The first passage 1148 and the secondpassage 1150 may, however, be configured differently. As examples, thefirst passage 1148 and the second passage 1150 may be straight, may becurved, may define a serpentine configuration, or may be configuredaccording to any other shape. The first passage 1148 and the secondpassage 1150 may or may not be the same shape.

In the illustrated example, a first end portion 1136 of the elongatemember 1106 extends from the first attachment point 1138, along a firstpath 1140 through the first passage 1148, and to the first opening 1128.A second end portion 1142 extends from the second attachment point 1144,along a second path 1146 through the second passage 1150, and to thesecond opening 1132.

The first end portion 1136 may be connected to the housing 1104 at thefirst attachment point 1138 by a first spring 1162. The second endportion 1142 may be connected to the housing 1104 at the secondattachment point 1144 by a second spring 1164. The first spring 1162 andthe second spring 1164 may be linear or variable rate extension,torsion, coil, flat, constant force, or any other suitable type ofspring. The first spring 1162 may or may not be identical to the secondspring 1164.

FIG. 12 is a top cross-sectional view taken along line A-A of FIG. 1 ofthe head mounted device 1100 according to the ninth example in anextended position. When the elongate member 1106 is adjusted from theretracted position to the extended position, the first spring 1162extends inside the first passage 1148, and the second spring 1164extends inside the second passage 1150. The first spring 1162 and thesecond spring 1164 exert tension on the elongate member 1106. Asdescribed with respect to FIG. 10, this tension allows the elongatemember 1106 to support the housing 1104 relative to the user's head. Inthe extended position, part of the first end portion 1136 extends out ofthe first passage 1148, and part of the second end portion 1142 extendsout of the second passage 1150. When the elongate member 1106 isadjusted to the retracted position, the first spring 1162 retracts thefirst end portion 1136 into the interior space 1124, and the secondspring 1164 retracts the second end portion 1142 into the interior space1124.

FIG. 13 is a side view of a head mounted device 1300 according to atenth example in a retracted position. The head mounted device 1300 mayinclude features similar to those of any head mounted device described.In the illustrated example, the head mounted device 1300 includes anelongate member 1306 and a housing 1304. The elongate member 1306includes a strap portion 1366 and a first cord 1368. The first cord 1368defines a first end portion 1336. One end of the first cord 1368 isconnected to a first attachment point 1338 inside the housing 1304. Anopposite end of the first cord 1368 is connected to a first end of thestrap portion 1366. In some embodiments, the elongate member 1306 mayinclude a second cord (not shown) defining a second end portion. Thesecond cord may be configured in the same way as the first cord 1368.

The first cord 1368 and the second cord may be retracted into aninterior space 1324 of the housing 1304 when the elongate member 1306 isin the retracted position. The first cord 1368 and the second cord mayexpand and contract elastically to adjust the length of the elongatemember 1306. The strap portion 1366 may have a greater width than thefirst cord 1368 and the second cord and may retain the head of the user.In some embodiments, the first cord 1368 and the second cord may be moreelastic than the strap portion 1366. The elongate member 1306 mayinclude the first cord 1368, the strap portion 1366, and the second cordin any described embodiment.

FIG. 14 is a side view of the head mounted device 1300 according to thetenth example in an extended position. In the illustrated example, partof the first cord 1368 extends from inside the interior space 1324 ofthe housing 1304. In some embodiments, part of the second cord alsoextends from inside the interior space 1324 of the housing 1304 when theelongate member 1306 is in the extended position. In the extendedposition, the strap portion 1366 may be engaged with a back portion ofthe user's head.

FIG. 15 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device 1500 according to an eleventh example in aretracted position. The head mounted device 1500 may include features ofthe head mounted device 300 except as otherwise described. In theillustrated example, the head mounted device 1500 includes a housing1504 and an elongate member 1506. The housing 1504 has an interior space1524 that defines a passage 1526. The passage 1526 extends from a firstopening 1528 located at a first lateral side 1530 of the housing 1504 toa second opening 1532 located at a second lateral side 1534 of thehousing 1504. A first attachment point 1538 is disposed inside thepassage 1526 at a location near the second lateral side 1534 of thehousing 1504. A second attachment point 1544 is disposed inside thepassage 1526 at a location near the first lateral side 1530 of thehousing 1504. The passage 1526 is generally straight. The passage 1526may, however, be configured differently. As examples, the passage 1526may be straight, may be curved, may define a serpentine configuration,or may be configured according to any other shape.

In the illustrated example, a first end portion 1536 of the elongatemember 1506 extends from the first attachment point 1538, along a firstpath 1540 through the passage 1526, and to the first opening 1528. Asecond end portion 1542 extends from the second attachment point 1544,along a second path 1546 through the passage 1526, and to the secondopening 1532.

The elongate member 1506 may include a first cord 1568 that defines thefirst end portion 1536, a second cord 1570 that defines the second endportion 1542, and a strap portion 1566 that connects the first cord 1568and the second cord 1570. The first cord 1568 extends from the strapportion 1566 to the first attachment point 1538. The second cord 1570extends from the strap portion 1566 to the second attachment point 1544.In the retracted position, the first cord 1568 and the second cord 1570are retracted into the interior space 1524 of the housing 1504 while thestrap portion 1566 remains exterior to the housing 1504.

FIG. 16 is a top cross-sectional view taken along line A-A of FIG. 1 ofthe head mounted device 1500 according to the eleventh example in anextended position. In the extended position, part of the first cord 1568and part of the second cord 1570 extend from inside the interior space1524 of the housing 1504 to the exterior of the housing 1504. In theextended position, the strap portion 1566 may extend around the user'shead.

FIG. 17 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device 1700 according to a twelfth example. The headmounted device 1700 may include features similar to those of any headmounted device previously described. In the illustrated example, thehead mounted device 1700 includes a housing 1704, an elongate member1706, and an elongate member control mechanism 1772 coupled to aninterior space 1724 of the housing 1704 in a location near a firstlateral side 1730 of the housing 1704. A first end portion 1736 of theelongate member 1706 is connected to the elongate member controlmechanism 1772 at a first attachment point 1738 located in the interiorspace 1724 of the housing 1704 near the first lateral side 1730 of thehousing 1704. A second end portion 1742 of the elongate member 1706 isconnected to the housing 1704 at a second attachment point 1744. Thesecond attachment point 1744 is located in the interior space 1724 ofthe housing 1704 near a second lateral side 1734 of the housing 1704.The elongate member 1706 may include a first cord 1768 that defines thefirst end portion 1736, a second cord 1770 that defines the second endportion 1742, and a strap portion 1766 that connects the first cord 1768and the second cord 1770.

The elongate member control mechanism 1772 is operable to extend theelongate member 1706 outside of the interior space 1724 of the housing1704 and/or retract the elongate member 1706 inside the interior space1724 of the housing 1704. The elongate member control mechanism 1772 caninclude a spool, winch, reel, ratchet, wheel, winder, or other devicecapable of retracting and/or extending a portion of the elongate member1706. The elongate member control mechanism 1772 may be actuated toextend and/or retract the elongate member 1706 by using any type ofspring, spring-loaded spool, motorized spool, or other suitableextension and/or retraction mechanism. The elongate member controlmechanism 1772 may apply axial tension on the elongate member 1706 toretract the elongate member 1706. In some embodiments including themotorized spool, the motorized spool may be actuated by a stepper motor,linear motor, or any other suitable motor. The motorized spool mayselectively extend and retract the elongate member 1706 between theretracted and extended positions. The motorized spool may be activatedby a controller 1712 or by the user via a button, switch, or the like.The controller 1712 may include features similar to those of thecontroller 212.

In some embodiments, the head mounted device 1700 may include anidentity sensor adapted to detect a user identity. The identity sensormay be included in the sensors 210. The identity sensor may be abiometric sensor and detect the user's retina, face, fingerprints, orthe like. The identity sensor may also detect gestures and/or otherdevices associated with the user, such as a smartphone.

In response to receiving a signal from the identity sensor indicative ofthe user's identity, the controller 1712 may select a user identityprofile corresponding to the user's identity. The user identity profilemay include user settings, such as an operative length of the elongatemember 1706. The operative length of the elongate member 1706 may be thelength of the elongate member 1706 extending around the user's headand/or the length of the elongate member 1706 retracted from themotorized spool.

In response to selecting the user identity profile, the controller 1712may use the elongate member control mechanism 1772 to extend or retractthe elongate member 1706 to the operative length according to the useridentity profile.

In some embodiments, the head mounted device 1700 may include a hapticfeedback feature. The controller 1712 may receive a signal indicative ofimages or other content experienced by the user. The content may includeany media, still images, video, audio, or other information. In responseto receiving the signal indicative of the content, the controller 1712may use the elongate member control mechanism 1772 to extend or retractthe elongate member 1706. As a result, the elongate member controlmechanism 1772 may tighten or loosen the elongate member 1706 around theuser's head in response to the content.

In some embodiments, the head mounted device 1700 may include a pressuresensor in electrical communication with the controller 1712. Thepressure sensor may be included in the sensors 210. The pressure sensormay be adapted to measure pressure between the head mounted device 1700and the head of the user. In some embodiments, the content experiencedby the user may be associated with a pressure value. In response toreceiving a signal indicative of the content, the controller 1712 maycause the motorized spool to extend or retract the elongate member 1706until the pressure (measured by the pressure sensor) between the user'shead and the head mounted device 1700 reaches the pressure value.

In some embodiments, the controller 1712 may cause the motorized spoolto extend or retract the elongate member 1706 in response to receiving asignal indicative of pressure (measured by the pressure sensor) betweenthe user's head and the head mounted device 1700. The controller 1712may compare the measured pressure to a predetermined pressure value.Based on a determination that the measured pressure is not equal to thepredetermined pressure value, the controller 1712 may use the elongatemember control mechanism 1772 to extend or retract the elongate member1706 to decrease or increase the pressure between the user's head andthe head mounted device 1700 to the pressure value.

FIG. 18 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device 1800 according to a thirteenth example. The headmounted device 1800 may include features similar to those of the headmounted device 1700 except as otherwise described. In the illustratedexample, the head mounted device 1800 includes a housing 1804 and anelongate member 1806. The head mounted device 1800 includes a firstelongate member control mechanism 1872 a coupled to an interior space1824 of the housing 1804 in a location near a first lateral side 1830 ofthe housing 1804. The head mounted device 1800 includes a secondelongate member control mechanism 1872 b coupled to the interior space1824 of the housing 1804 in a location near a second lateral side 1834of the housing 1804. The first elongate member control mechanism 1872 aand the second elongate member control mechanism 1872 b may includefeatures similar to those of the elongate member control mechanism 1772.

A first end portion 1836 of the elongate member 1806 is connected to thefirst elongate member control mechanism 1872 a at a first attachmentpoint 1838. The first attachment point 1838 is located in the interiorspace 1824 of the housing 1804 near the first lateral side 1830 of thehousing 1804. A second end portion 1842 of the elongate member 1806 isconnected to the second elongate member control mechanism 1872 b at asecond attachment point 1844. The second attachment point 1844 islocated in the interior space 1824 of the housing 1804 near the secondlateral side 1834 of the housing 1804. The elongate member 1806 mayinclude a first cord 1868 that defines the first end portion 1836, asecond cord 1870 that defines the second end portion 1842, and a strapportion 1866 that connects the first cord 1868 and the second cord 1870.The first elongate member control mechanism 1872 a is operable to extendand/or retract the first end portion 1836 of the elongate member 1806.The second elongate member control mechanism 1872 b is operable toextend and/or retract the second end portion 1842 of the elongate member1806.

FIG. 19 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device 1900 according to a fourteenth example. The headmounted device 1900 may include features similar to those of the headmounted device 1700 except as otherwise described. In the illustratedexample, the head mounted device 1900 includes a housing 1904, anelongate member 1906, and an elongate member control mechanism 1972coupled to an interior space 1924 of the housing 1904 in a location neara first lateral side 1930 of the housing 1904. The elongate membercontrol mechanism 1972 may include features similar to those of theelongate member control mechanism 1772. A first end portion 1936 of theelongate member 1906 is connected to the elongate member controlmechanism 1972 at a first attachment point 1938 located in the interiorspace 1924 of the housing 1904 near the first lateral side 1930 of thehousing 1904. A second end portion 1942 of the elongate member 1906 isconnected to the housing 1904 at a second attachment point 1944. Thesecond attachment point 1944 is located in the interior space 1924 ofthe housing 1904 near a second lateral side 1934 of the housing 1904.

The head mounted device 1900 includes an elongate member retainingmechanism 1974 connected to the housing 1904 near the first lateral side1930. The elongate member retaining mechanism 1974 is operable to engagethe elongate member 1906 to restrain extension and retraction of theelongate member 1906 from the interior space 1924 of the housing 1904.The elongate member retaining mechanism 1974 may be connected to thehousing 1904 in the interior space 1924 of the housing 1904 or on anexterior of the housing 1904.

FIG. 20 is a side view of the elongate member retaining mechanism 1974in an open position. FIG. 21 is a side view of the elongate memberretaining mechanism 1974 of FIG. 20 in a closed position. The elongatemember retaining mechanism 1974 may include a clamp 1976 through whichthe elongate member 1906 extends and an actuator 1978 connected to theclamp 1976. The actuator 1978 may selectively close the clamp 1976 toretain the elongate member 1906 in a closed position and open the clamp1976 to release the elongate member 1906 in an open position. Theactuator 1978 may include a magnet and electromagnet, solenoid, spring,motor, or any other suitable actuator. The actuator 1978 may be inelectrical communication with a controller. The controller may includefeatures similar to those of the controller 212. The controller may usethe actuator 1978 to move the elongate member retaining mechanism 1974into the closed position to restrain the elongate member 1906 in theretracted position or the extended position.

In the illustrated example, the clamp 1976 includes a first member 1980and a second member 1982. The first member 1980 and the second member1982 are connected to the housing 1904 such that a portion of theelongate member 1906 extends between the first member 1980 and thesecond member 1982. The actuator 1978 may be connected to the firstmember 1980, the second member 1982, or both the first member 1980 andthe second member 1982. The actuator 1978 may move the first member1980, the second member 1982, or both the first member 1980 and thesecond member 1982 to the closed position. In some embodiments, thesecond member 1982 may include a portion of the housing 1904.

In the illustrated example, the first member 1980, the second member1982, or both the first member 1980 and the second member 1982 mayinclude protrusions 1984 configured to retain the elongate member 1906between the first member 1980 and the second member 1982 when the clamp1976 is in the closed position. The first member 1980, the second member1982, or both the first member 1980 and the second member 1982 mayinclude recesses corresponding to the protrusions 1984 such that theprotrusions 1984 press the elongate member 1906 into the recesses whenthe clamp 1976 is in the closed position.

FIG. 22 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device 2200 according to a fifteenth example. The headmounted device 2200 may include features similar to those of the headmounted device 1800 and the head mounted device 1900 except as otherwisedescribed. In the illustrated example, the head mounted device 2200includes a housing 2204 and an elongate member 2206. The head mounteddevice 2200 includes a first elongate member control mechanism 2272 acoupled to an interior space 2224 of the housing 2204 in a location neara first lateral side 2230 of the housing 2204. The head mounted device2200 includes a second elongate member control mechanism 2272 b coupledto the interior space 2224 of the housing 2204 in a location near asecond lateral side 2234 of the housing 2204. The first elongate membercontrol mechanism 2272 a and the second elongate member controlmechanism 2272 b may include features similar to those of the elongatemember control mechanism 1772.

A first end portion 2236 of the elongate member 2206 is connected to thefirst elongate member control mechanism 2272 a at a first attachmentpoint 2238. The first attachment point 2238 is located in the interiorspace 2224 of the housing 2204 near the first lateral side 2230 of thehousing 2204. A second end portion 2242 of the elongate member 2206 isconnected to the second elongate member control mechanism 2272 b at asecond attachment point 2244. The second attachment point 2244 islocated in the interior space 2224 of the housing 2204 near the secondlateral side 2234 of the housing 2204.

The head mounted device 2200 may include a first elongate memberretaining mechanism 2274 a and a second elongate member retainingmechanism 2274 b. The first elongate member retaining mechanism 2274 aand the second elongate member retaining mechanism 2274 b may includefeatures similar to those of the elongate member retaining mechanism1974. The first elongate member retaining mechanism 2274 a and thesecond elongate member retaining mechanism 2274 b may include featuressimilar to those of the elongate member retaining mechanism 1974. Thefirst elongate member retaining mechanism 2274 a is connected to thehousing 2204 near the first lateral side 2230. The second elongatemember retaining mechanism 2274 b is connected to the housing 2204 nearthe second lateral side 2234. The first elongate member retainingmechanism 2274 a restrains the first end portion 2236 of the elongatemember 2206 from being extended from or retracted into the interiorspace 2224 of the housing 2204. The second elongate member retainingmechanism 2274 b restrains the second end portion 2242 of the elongatemember 2206 from being extended from or retracted into the interiorspace 2224 of the housing 2204.

FIG. 23 is a perspective view of a head mounted device 2300 according toa sixteenth example in a connected position. FIG. 24 is a perspectiveview of the head mounted device 2300 according to the sixteenth examplein a disconnected position. The head mounted device 2300 may includefeatures similar to those of any described head mounted device. In theillustrated example, the head mounted device 2300 includes a housing2304 and an elongate member 2306. The head mounted device 2300 includeslenses 2352 coupled to the housing 2304. The elongate member 2306includes a first cord 2368, a second cord 2370, and a lens cover 2386having at least one connector 2388. One end of the lens cover 2386 isconnected to a first attachment point 2338 using the first cord 2368.The first attachment point 2338 is disposed in an interior space 2324 ofthe housing 2304 in a location near a first lateral side 2330 of thehousing 2304. The other end of the lens cover 2386 is connected to asecond attachment point 2344 using the second cord 2370. The secondattachment point 2344 is disposed in the interior space 2324 of thehousing 2304 in a location near a second lateral side 2334 of thehousing 2304.

The at least one connector 2388 removably connects to the housing 2304and may be disposed on the periphery of the lens cover 2386. The atleast one connector 2388 may include any type of adhesive, magnets,stitching, hook-and-loop fasteners, welding, rivets, interference fit,snaps, fastener, or any other type of attachment. The housing 2304 mayinclude connectors corresponding to the at least one connector 2388disposed around the periphery of the lenses 2352 or at any otherlocation on the housing 2304. The at least one connector 2388 mayremovably connect to the corresponding connectors. The correspondingconnectors may include any described attachment.

The lens cover 2386 is moveable relative to the housing 2304 between aconnected position and a disconnected position. In the connectedposition shown in FIG. 23, the lens cover 2386 is connected to thehousing 2304 using the at least one connector 2388 and substantiallycovers the lenses 2352. In the disconnected position shown in FIG. 24,the lens cover 2386 contacts the back portion of the user's head whenthe elongate member 2306 is extended around the user's head.

FIG. 25 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device 2500 according to a seventeenth example in aretracted position. FIG. 26 is a top cross-sectional view taken alongline A-A of FIG. 1 of the head mounted device 2500 according to theseventeenth example in an extended position. The head mounted device2500 may include features similar to any head mounted device previouslydescribed. In the illustrated examples, the head mounted device 2500includes a housing 2504 and an elongate member 2506. The elongate member2506 is connected at one end to an elongate member control mechanism2572 at a first attachment point 2538 disposed in an interior space 2524of the housing 2504 in a location near a first lateral side 2530 of thehousing 2504. The elongate member control mechanism 2572 may includefeatures similar to those of the elongate member control mechanism 1772.The elongate member 2506 is connected at the other end to a firstmagnetic connector 2590. A second magnetic connector 2592 is connectedto the housing 2504 near the second lateral side 2534. A third magneticconnector 2594 is connected to the housing 2504 near the first lateralside 2530. The first magnetic connector 2590, the second magneticconnector 2592, and the third magnetic connector 2594 may be any type ofmagnet or electromagnet of any shape and size. The magnetic poles of thefirst magnetic connector 2590, the second magnetic connector 2592, andthe third magnetic connector 2594 may have any orientation.

The first magnetic connector 2590 and the second magnetic connector 2592may be movable between a connected position and a disconnected position.In the disconnected position shown in FIG. 25, the elongate member 2506is retracted into the interior space 2524, and the first magneticconnector 2590 is connected to the third magnetic connector 2594 forstorage of the elongate member 2506. In the disconnected position, theelongate member 2506 is not extended around the user's head, and thehousing 2504 is released with respect to the head of the user. In theconnected position shown in FIG. 26, the elongate member 2506 isextended out of the interior space 2524, and the first magneticconnector 2590 is connected to the second magnetic connector 2592. Inthe connected position, the elongate member 2506 may be extended aroundthe user's head, and the housing 2504 may be secured relative to theuser's head.

In some embodiments, the first magnetic connector 2590 may include amagnetic protrusion, and the second magnetic connector 2592 may includea corresponding magnetic recess. In the connected position, the magneticprotrusion of the first magnetic connector 2590 may be connected to thesecond magnetic connector 2592 inside the magnetic recess. Additionallyand/or alternatively, the first magnetic connector 2590 may include themagnetic recess, and the second magnetic connector 2592 may include themagnetic protrusion.

FIG. 27 is a top cross-sectional view taken along line A-A of FIG. 1 ofa head mounted device 2700 according to an eighteenth example in aretracted position. FIG. 28 is a top cross-sectional view taken alongline A-A of FIG. 1 of the head mounted device 2700 according to theeighteenth example in an extended position. The head mounted device 2700may include features similar to those of the head mounted device 2500except as otherwise described. In the illustrated examples, the headmounted device 2700 includes a housing 2704, a first elongate member2706 a, and a second elongate member 2706 b. The first elongate member2706 a is connected at one end to a first elongate member controlmechanism 2772 a at a first attachment point 2738 disposed in aninterior space 2724 of the housing 2704 in a location near a firstlateral side 2730 of the housing 2704. The other end of the firstelongate member 2706 a is connected to a first magnetic connector 2790.The second elongate member 2706 b is connected at one end to a secondelongate member control mechanism 2772 b at a second attachment point2744 disposed in the interior space 2724 of the housing 2704 in alocation near a second lateral side 2734 of the housing 2704. The otherend of the second elongate member 2706 b is connected to a secondmagnetic connector 2792. The first elongate member control mechanism2772 a and the second elongate member control mechanism 2772 b mayinclude features similar to those of the elongate member controlmechanism 1772. A third magnetic connector 2794 is connected to thehousing 2704 near the first lateral side 2730. A fourth magneticconnector 2796 is connected to the housing 2704 near the second lateralside 2734. The first magnetic connector 2790, the second magneticconnector 2792, the third magnetic connector 2794, and the fourthmagnetic connector 2796 may include features similar to those of anyother described magnetic connector.

The first magnetic connector 2790 and the second magnetic connector 2792may be movable between a connected position and a disconnected position.In the disconnected position shown in FIG. 27, the first elongate member2706 a is retracted into the interior space 2724 near the first lateralside 2730, and the second elongate member 2706 b is retracted into theinterior space 2724 near the second lateral side 2734. The firstmagnetic connector 2790 is connected to the third magnetic connector2794 for storage of the first elongate member 2706 a. The secondmagnetic connector 2792 is connected to the fourth magnetic connector2796 for storage of the second elongate member 2706 b. In thedisconnected position, the first elongate member 2706 a and the secondelongate member 2706 b are not extended around the user's head, and thehousing 2704 is released with respect to the head of the user. In theconnected position shown in FIG. 28, the first elongate member 2706 a isextended from the interior space 2724 near the first lateral side 2730,and the second elongate member 2706 b is extended from the interiorspace 2724 near the second lateral side 2734. The first magneticconnector 2790 is connected to the second magnetic connector 2792. Inthe connected position, the first elongate member 2706 a and the secondelongate member 2706 b may be extended around the user's head, and thehousing 2704 may be secured relative to the user's head.

In some embodiments, the first elongate member 2706 a may be connectedto the housing 2704 by a first spring-loaded spool, and the secondelongate member 2706 b may be connected to the housing 2704 by a secondspring-loaded spool as described.

In some embodiments, the first elongate member 2706 a may be connectedto the housing 2704 by a first motorized spool, and the second elongatemember 2706 b may be connected to the housing 2704 by a second motorizedspool as described.

FIG. 29 is a side view of a head mounted device 2900 according to anineteenth example in a first position. FIG. 30 is a side view of thehead mounted device 2900 according to the nineteenth example in a secondposition. The head mounted device 2900 may include features similar tothose of any head mounted device previously described. While being wornby the user, the head mounted device 2900 may slip from a first position(shown in FIG. 29), which may be referred to as an original position, toa second position (shown in FIG. 30). A change in position of the headmounted device 2900 may result in poor image quality and userdiscomfort.

In the illustrated example, the head mounted device 2900 includes ahousing 2904 and an elongate member 2906 connected to the housing 2904.The elongate member 2906 is extended around the head of the user suchthat the housing 2904 is secured relative to the user's head. Thehousing 2904 defines a display enclosure 2901. The display enclosure2901 is a space defined by the housing 2904 between the eyes of the userand a display 2920 through which the user views the content.

The head mounted device 2900 includes an elongate member controlmechanism 2972 coupled to the housing 2904 and to the elongate member2906. The elongate member control mechanism 2972 may include featuressimilar to those of the elongate member control mechanism 1772. Theelongate member control mechanism 2972 extends and retracts the elongatemember 2906 into and out of the housing 2904 to move the displayenclosure 2901 relative to the user's head. In some embodiments, acontroller 2912 may use the elongate member control mechanism 2972 tomove the head mounted device 2900 between the first position and thesecond position. The controller 2912 may include features similar tothose of the controller 212.

The head mounted device 2900 includes a first motion sensing device 2998that detects movement of the display enclosure 2901. The first motionsensing device 2998 may be included in the sensors 210. The first motionsensing device 2998 may include an inertial measurement unit,magnetometer, accelerometer, gyroscope, or any other suitable motionsensor. The first motion sensing device 2998 is connected to the housing2904. The first motion sensing device 2998 may be coupled to the housing2904 in the display enclosure 2901 or in any other location on thehousing 2904.

The head mounted device 2900 includes a second motion sensing device2903 that detects motion of the elongate member 2906. The second motionsensing device 2903 may include features similar to those of the firstmotion sensing device 2998. The second motion sensing device 2903 isconnected to the elongate member 2906. The first motion sensing device2998 and the second motion sensing device 2903 may send respectivesignals to the controller 2912 indicative of the motion of the displayenclosure 2901 and the elongate member 2906.

FIG. 31 is a flowchart showing a process 3100 for correcting anorientation of the head mounted device 2900 according to the nineteenthexample. In operation 3105, the first motion sensing device 2998 detectsmotion of the display enclosure 2901.

In operation 3107, the second motion sensing device 2903 detects motionof the elongate member 2906.

In operation 3109, the controller 2912 determines a change in positionof the display enclosure 2901 relative to the elongate member 2906 basedon the detected motion of the display enclosure 2901 and the detectedmotion of the elongate member 2906. If the controller 2912 does notdetermine a change in position of the display enclosure 2901 relative tothe elongate member 2906, the controller 2912 may return to operation3105.

In operation 3111, in response to a determination that the position ofthe display enclosure 2901 has changed relative to the elongate member2906, the controller 2912 applies a correction to the display enclosure2901. In some embodiments, the controller 2912 may iteratively repeatany of the described operations.

In some embodiments, applying the correction to the display enclosure2901 in operation 3111 may include activating the elongate membercontrol mechanism 2972 coupled to the elongate member 2906 to move thedisplay enclosure 2901 to the first position. The controller 2912 mayuse the elongate member control mechanism 2972 to retract a portion ofthe elongate member 2906 into the housing 2904 to move the head mounteddevice 2900 from the second position to the first position.

In some embodiments, applying the correction to the display enclosure2901 in operation 3111 may include applying software image correction toa display 2920. The display 2920 may include features similar to thoseof the display 220. If the content viewed by the user is distorted bymovement of the head mounted device 2900, the controller 2912 mayre-render the content using the display 2920 to align the user's newfield of view with the content such that the image viewed by the user isno longer distorted.

A physical environment refers to a physical world that people can senseand/or interact with without aid of electronic systems. Physicalenvironments, such as a physical park, include physical articles, suchas physical trees, physical buildings, and physical people. People candirectly sense and/or interact with the physical environment, such asthrough sight, touch, hearing, taste, and smell.

In contrast, a computer-generated reality (CGR) environment refers to awholly or partially simulated environment that people sense and/orinteract with via an electronic system. In CGR, a subset of a person'sphysical motions, or representations thereof, are tracked, and, inresponse, one or more characteristics of one or more virtual objectssimulated in the CGR environment are adjusted in a manner that comportswith at least one law of physics. For example, a CGR system may detect aperson's head turning and, in response, adjust graphical content and anacoustic field presented to the person in a manner similar to how suchviews and sounds would change in a physical environment. In somesituations (e.g., for accessibility reasons), adjustments tocharacteristic(s) of virtual object(s) in a CGR environment may be madein response to representations of physical motions (e.g., vocalcommands).

A person may sense and/or interact with a CGR object using any one oftheir senses, including sight, sound, touch, taste, and smell. Forexample, a person may sense and/or interact with audio objects thatcreate 3D or spatial audio environment that provides the perception ofpoint audio sources in 3D space. In another example, audio objects mayenable audio transparency, which selectively incorporates ambient soundsfrom the physical environment with or without computer-generated audio.In some CGR environments, a person may sense and/or interact only withaudio objects.

Examples of CGR include virtual reality and mixed reality.

A virtual reality (VR) environment refers to a simulated environmentthat is designed to be based entirely on computer-generated sensoryinputs for one or more senses. A VR environment comprises a plurality ofvirtual objects with which a person may sense and/or interact. Forexample, computer-generated imagery of trees, buildings, and avatarsrepresenting people are examples of virtual objects. A person may senseand/or interact with virtual objects in the VR environment through asimulation of the person's presence within the computer-generatedenvironment, and/or through a simulation of a subset of the person'sphysical movements within the computer-generated environment.

In contrast to a VR environment, which is designed to be based entirelyon computer-generated sensory inputs, a mixed reality (MR) environmentrefers to a simulated environment that is designed to incorporatesensory inputs from the physical environment, or a representationthereof, in addition to including computer-generated sensory inputs(e.g., virtual objects). On a virtuality continuum, a mixed realityenvironment is anywhere between, but not including, a wholly physicalenvironment at one end and virtual reality environment at the other end.

In some MR environments, computer-generated sensory inputs may respondto changes in sensory inputs from the physical environment. Also, someelectronic systems for presenting an MR environment may track locationand/or orientation with respect to the physical environment to enablevirtual objects to interact with real objects (that is, physicalarticles from the physical environment or representations thereof). Forexample, a system may account for movements so that a virtual treeappears stationery with respect to the physical ground.

Examples of mixed realities include augmented reality and augmentedvirtuality.

An augmented reality (AR) environment refers to a simulated environmentin which one or more virtual objects are superimposed over a physicalenvironment, or a representation thereof. For example, an electronicsystem for presenting an AR environment may have a transparent ortranslucent display through which a person may directly view thephysical environment. The system may be configured to present virtualobjects on the transparent or translucent display, so that a person,using the system, perceives the virtual objects superimposed over thephysical environment. Alternatively, a system may have an opaque displayand one or more imaging sensors that capture images or video of thephysical environment, which are representations of the physicalenvironment. The system composites the images or video with virtualobjects and presents the composition on the opaque display. A person,using the system, indirectly views the physical environment by way ofthe images or video of the physical environment, and perceives thevirtual objects superimposed over the physical environment. As usedherein, a video of the physical environment shown on an opaque displayis called “pass-through video,” meaning a system uses one or more imagesensor(s) to capture images of the physical environment and uses thoseimages in presenting the AR environment on the opaque display. Furtheralternatively, a system may have a projection system that projectsvirtual objects into the physical environment, for example, as ahologram or on a physical surface, so that a person, using the system,perceives the virtual objects superimposed over the physicalenvironment.

An augmented reality environment also refers to a simulated environmentin which a representation of a physical environment is transformed bycomputer-generated sensory information. For example, in providingpass-through video, a system may transform one or more sensor images toimpose a select perspective (e.g., viewpoint) different than theperspective captured by the imaging sensors. As another example, arepresentation of a physical environment may be transformed bygraphically modifying (e.g., enlarging) portions thereof, such that themodified portion may be representative but not photorealistic versionsof the originally captured images. As a further example, arepresentation of a physical environment may be transformed bygraphically eliminating or obfuscating portions thereof.

An augmented virtuality (AV) environment refers to a simulatedenvironment in which a virtual or computer-generated environmentincorporates one or more sensory inputs from the physical environment.The sensory inputs may be representations of one or more characteristicsof the physical environment. For example, an AV park may have virtualtrees and virtual buildings, but people with faces photorealisticallyreproduced from images taken of physical people. As another example, avirtual object may adopt a shape or color of a physical article imagedby one or more imaging sensors. As a further example, a virtual objectmay adopt shadows consistent with the position of the sun in thephysical environment.

There are many different types of electronic systems that enable aperson to sense and/or interact with various CGR environments. Examplesinclude head mounted systems, projection-based systems, heads-updisplays (HUDs), vehicle windshields having integrated displaycapability, windows having integrated display capability, displaysformed as lenses designed to be placed on a person's eyes (e.g., similarto contact lenses), headphones/earphones, speaker arrays, input systems(e.g., wearable or handheld controllers with or without hapticfeedback), smartphones, tablets, and desktop/laptop computers. A headmounted system may have one or more speaker(s) and an integrated opaquedisplay. Alternatively, a head mounted system may be configured toaccept an external opaque display (e.g., a smartphone). The head mountedsystem may incorporate one or more imaging sensors to capture images orvideo of the physical environment, and/or one or more microphones tocapture audio of the physical environment. Rather than an opaquedisplay, a head mounted system may have a transparent or translucentdisplay. The transparent or translucent display may have a mediumthrough which light representative of images is directed to a person'seyes. The display may utilize digital light projection, OLEDs, LEDs,uLEDs, liquid crystal on silicon, laser scanning light source, or anycombination of these technologies. The medium may be an opticalwaveguide, a hologram medium, an optical combiner, an optical reflector,or any combination thereof. In one embodiment, the transparent ortranslucent display may be configured to become opaque selectively.Projection-based systems may employ retinal projection technology thatprojects graphical images onto a person's retina. Projection systemsalso may be configured to project virtual objects into the physicalenvironment, for example, as a hologram or on a physical surface.

As described above, one aspect of the present technology is thegathering and use of data available from various sources to allow thehead mounted devices described herein to accommodate users havingvarying head sizes. The present disclosure contemplates that in someinstances, this gathered data may include personal information data thatuniquely identifies or can be used to contact or locate a specificperson. Such personal information data can include demographic data,location-based data, telephone numbers, email addresses, Twitter IDs,home addresses, data or records relating to a user's health or level offitness (e.g., vital signs measurements, medication information,exercise information), date of birth, or any other identifying orpersonal information.

The present disclosure recognizes that the use of such personalinformation data, in the present technology, can be used to the benefitof users. For example, the personal information data can be used tocreate a user identity profile that is associated with a user'spreferred head mounted device settings. Further, other uses for personalinformation data that benefit the user are also contemplated by thepresent disclosure. For instance, health and fitness data may be used toprovide insights into a user's general wellness or may be used aspositive feedback to individuals using technology to pursue wellnessgoals.

The present disclosure contemplates that the entities responsible forthe collection, analysis, disclosure, transfer, storage, or other use ofsuch personal information data will comply with well-established privacypolicies and/or privacy practices. In particular, such entities shouldimplement and consistently use privacy policies and practices that aregenerally recognized as meeting or exceeding industry or governmentalrequirements for maintaining personal information data private andsecure. Such policies should be easily accessible by users and should beupdated as the collection and/or use of such data changes. Personalinformation from users should be collected for legitimate and reasonableuses of the entity and not shared or sold outside of those legitimateuses. Further, such collection/sharing should occur after receiving theinformed consent of the users. Additionally, such entities shouldconsider taking any needed steps for safeguarding and securing access tosuch personal information data and ensuring that others with access tothe personal information data adhere to such entities' privacy policiesand procedures. Further, such entities can subject themselves toevaluation by third parties to certify their adherence to widelyaccepted privacy policies and practices. In addition, policies andpractices should be adapted for the particular types of personalinformation data being collected and/or accessed and adapted toapplicable laws and standards, including jurisdiction-specificconsiderations. For instance, in the United States, the collection of oraccess to certain health data may be governed by federal and/or statelaws, such as the Health Insurance Portability and Accountability Act(HIPAA); whereas health data in other countries may be subject to otherregulations and policies and should be handled accordingly. Hence,different privacy practices should be maintained for different personaldata types in each country.

Despite the foregoing, the present disclosure also contemplatesembodiments in which users selectively block the use of, or access to,their personal information data. That is, the present disclosurecontemplates that hardware and/or software elements can be provided toprevent or block access to such personal information data. For example,in the case of head mounted devices, the present technology can beconfigured to allow users to select to “opt in” or “opt out” ofparticipation in the collection of personal information data duringregistration for services or anytime thereafter. In another example,users can opt out of providing (i.e., choose not to provide) theirpreferred head mounted device settings for adjustment of the headmounted device. In yet another example, users can opt to limit thelength of time that their preferred settings are maintained or entirelyprohibit the development of preferred settings. In addition to providing“opt in” and “opt out” options, the present disclosure contemplatesproviding notifications relating to the access or use of personalinformation. For instance, users may be notified upon downloading an appthat their personal information data will be accessed and then remindedagain just before their personal information data is accessed by theapp.

Moreover, it is the intent of the present disclosure that personalinformation data should be managed and handled in such a manner as tominimize the risk of unintentional or unauthorized access to or use ofsuch personal information data. Such risk can be minimized by limitingthe collection of data and deleting data once it is no longer needed. Inaddition, and when applicable, including in certain health-relatedapplications, data de-identification can be used to protect users'privacy. De-identification may be facilitated, when appropriate, byremoving specific identifiers (e.g., date of birth, etc.), controllingthe amount or specificity of data stored (e.g., collecting location dataat a city level rather than at an address level), controlling how datais stored (e.g., aggregating data across users), and/or other methods.

Therefore, although the present disclosure broadly covers the use ofpersonal information data to implement one or more of the variousdisclosed embodiments, the present disclosure also contemplates that thevarious embodiments can also be implemented without the need foraccessing such personal information data. That is, the variousembodiments of the present technology are not rendered inoperable due tothe lack of all or a portion of such personal information data. Forexample, the head mounted devices described herein may be adjustedmanually or adjusted based on non-personal information data or a bareminimum amount of personal information, such as the content beingrequested by the device associated with a user, other non-personalinformation available to the head mounted device, or publicly availableinformation.

While the disclosure includes certain embodiments, the disclosure is notto be limited to the described embodiments but is intended to covermodifications and equivalent configurations included within the scope ofthe appended claims. The scope of the appended claims is to be accordedthe broadest interpretation as is permitted under the law so as toencompass all such modifications and equivalent configurations.

What is claimed is:
 1. A head mounted device, comprising: a housing thatdefines an interior space; and an elongate member connected to thehousing that is configured to expand and contract to conform to the headof a user, the elongate member including: at least one end portion thatis connected to the housing at an attachment point that is located inthe interior space of the housing such that the end portion of theelongate member extends along a path within the housing that has alength that is greater than half of a lateral width of the housing. 2.The head mounted device of claim 1, further comprising: an openinglocated at a first lateral side of the housing, wherein the interiorspace of the housing defines a passage that extends from the opening tothe attachment point, wherein the attachment point is located near asecond lateral side of the housing opposite the first lateral side ofthe housing.
 3. The head mounted device of claim 1, further comprising:an opening located at a first lateral side of the housing, wherein theinterior space of the housing defines a passage that extends from theopening to the attachment point, wherein the attachment point is locatednear the first lateral side of the housing.
 4. The head mounted deviceof claim 1, wherein the end portion is connected to the housing at theattachment point by a spring.
 5. The head mounted device of claim 1,wherein the elongate member includes: a first end portion that isconnected to the housing at a first attachment point that is located inthe interior space of the housing such that the first end portion of theelongate member extends along a first path within the housing that has alength that is greater than half of a lateral width of the housing; anda second end portion that is connected to the housing at a secondattachment point that is located in the interior space of the housingsuch that the second end portion of the elongate member extends along asecond path within the housing that has a second length that is greaterthan half of the lateral width of the housing.
 6. The head mounteddevice of claim 5, wherein: a first opening is located at a firstlateral side of the housing; a second opening is located at a secondlateral side of the housing; the interior space of the housing defines apassage that extends from the first opening to the second opening; thefirst attachment point is located near the second opening; and thesecond attachment point is located near the first opening.
 7. The headmounted device of claim 5, wherein: a first opening is located at afirst lateral side of the housing; a second opening is located at asecond lateral side of the housing; the interior space of the housingdefines a first serpentine passage that extends from the first openingto the first attachment point; and the interior space of the housingdefines a second serpentine passage that extends from the first openingto the second attachment point.
 8. The head mounted device of claim 5,wherein: a first opening is located at a first lateral side of thehousing; a second opening is located at a second lateral side of thehousing; the interior space of the housing defines a first passage thatextends from the first opening to the first attachment point and asecond passage that extends from the second opening to the secondattachment point; the first attachment point is located near the secondopening; and the second attachment point is located near the firstopening.
 9. The head mounted device of claim 5, wherein: a first openingis located at a first lateral side of the housing; a second opening islocated at a second lateral side of the housing; the interior space ofthe housing defines a first passage that extends from the first openingto the first attachment point and a second passage that extends from thesecond opening to the second attachment point; the first attachmentpoint is located near the first opening; and the second attachment pointis located near the second opening.
 10. The head mounted device of claim5, wherein: the first end portion is connected to the housing at thefirst attachment point by a first spring; and the second end portion isconnected to the housing at the second attachment point by a secondspring.
 11. The head mounted device of claim 5, wherein the elongatemember includes a strap portion, the first end portion is defined by afirst cord that extends from the strap portion to the first attachmentpoint, and the second end portion is defined by a second cord thatextends from the strap portion to the second attachment point.
 12. Thehead mounted device of claim 11, wherein the first cord and the secondcord are configured to expand and contract to adjust the length of theelongate member and the strap portion is configured to retain the headof the user.
 13. The head mounted device of claim 1, further comprising:lenses coupled to the housing, wherein: the elongate member includes alens cover having at least one connector configured to removably connectto the housing; and the lens cover is moveable relative to the housingbetween a connected position and a disconnected position.
 14. The headmounted device of claim 13, wherein the lens cover is configured tocontact a back portion of the head of the user in the disconnectedposition.
 15. The head mounted device of claim 1, further comprising: anelongate member control mechanism coupled to the interior space of thehousing, wherein the elongate member control mechanism is operable toextend and retract the elongate member; and an elongate member retainingmechanism that is located in the housing and is operable to engage theelongate member to restrain extension and retraction of the elongatemember.
 16. The head mounted device of claim 15, wherein the elongatemember retaining mechanism includes: a clamp through which the elongatemember extends; and an actuator coupled to the clamp, wherein theactuator selectively closes the clamp to retain the elongate member. 17.The head mounted device of claim 15, wherein the elongate member controlmechanism includes a spring-loaded spool, the spring-loaded spool beingconfigured to apply axial tension to the elongate member to retract atleast a portion of the elongate member into the interior space of thehousing.
 18. The head mounted device of claim 15, wherein the elongatemember control mechanism includes a motorized spool, and wherein themotorized spool is configured to selectively extend and retract theelongate member.
 19. The head mounted device of claim 18, furthercomprising: a sensor adapted to detect a user identity, the sensorcoupled to the head mounted device; and a controller coupled to thehousing and in electrical communication with the sensor, the motorizedspool and the elongate member retaining mechanism, wherein thecontroller is operable to: receive a signal from the sensor indicativeof the user identity; and select a user identity profile correspondingto the user identity, the user identity profile including an operativelength of the elongate member, wherein in response to selecting the useridentity profile, the controller uses the motorized spool to adjust theoperative length of the elongate member according to the user identityprofile and engages the elongate member retaining mechanism.
 20. Thehead mounted device of claim 18, further comprising a controller coupledto the housing and in electrical communication with the motorized spool,the controller operable to: receive a signal indicative of content; andin response to receiving the signal indicative of content, use themotorized spool to adjust an operative length of the elongate member andengage the elongate member retaining mechanism.
 21. The head mounteddevice of claim 20, further comprising: a pressure sensor in electricalcommunication with the controller, the pressure sensor adapted tomeasure pressure between the head mounted device and the head of theuser, wherein content is associated with a pressure value, and whereinthe controller causes the motorized spool to extend or retract theelongate member in response to receiving a signal from the pressuresensor.